Concrete Slab Installations - Exhaust Through Window Well
Calculating Vent System Length
A
BD
C
E
F 
G
H
To calculate the length of the system you need, add the equivalent feet (meters) for each vent piece used in the system.
Vent Piece | 6" (15.2 cm) Round |
45° elbow | 2.5 ft |
| (0.8 m) |
N
M
K
L
I
J
90° elbow | 5.0 ft |
| (1.5 m) |
A. Wall cap
B. 12" (30.5 cm) minimum C. Concrete slab
D. 6" (15.2 cm) round PVC sewer pipe
E. 5" to 6" (12.7 cm to 15.2 cm) transition F. 6" (15.2 cm) round metal duct
G. 6" (15.2 cm) round PVC coupling H. 6" (15.2 cm) round PVC sewer pipe
I. 6" (15.2 cm) round 90° PVC sewer pipe elbow
J. Tightly pack gravel or sand completely around pipe. K. 42 ft (12.8 m) max.
L. 6" (15.2 cm) round PVC coupling M. 6" (15.2 cm) minimum
N. Window well
Concrete Slab Installations - Exhaust Through Wall
B
6" (15.2 cm) | 0.0 ft |
wall cap | (0.0 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 4.5 ft |
to 6" (15.2 cm) transition | (1.4 m) |
|
|
6" (15.2 cm) to 3¹⁄₄" x 10" | 1 ft |
(8.3 cm x 25.4 cm) transition | (0.3 m) |
A
O
N
M
D
C
L
E
F
G
H I
J
K
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 9.0 ft |
to 6" (15.2 cm) 90° elbow | (2.7 m) |
transition |
|
|
|
6" (15.2 cm) to 3¹⁄₄" x 10" | 5.0 ft |
(8.3 cm x 25.4 cm) 90° elbow | (1.5 m) |
transition |
|
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 5.0 ft |
A. Wall cap
B. 6" (15.2 cm) round metal vent C. 16" (40.6 cm) maximum
D. 6" (15.2 cm) round PVC sewer pipe
E. 5" to 6" (12.7 cm to 15.2 cm) transition F. 6" (15.2 cm) round metal duct
G. 6" (15.2 cm) round PVC coupling H. Concrete slab
I. 6" (15.2 cm) round PVC sewer pipe
J. 6" (15.2 cm) round 90° PVC sewer pipe elbow
K. Tightly pack gravel or sand completely around pipe. L. 30 ft (9.1 m) max.
M. 6" (15.2 cm) round 90° PVC sewer pipe elbow N. 6" (15.2 cm) round PVC coupling
O. 12" (30.5 cm) minimum
90° elbow | (1.5 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 12.0 ft |
flat elbow | (3.7 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 0.0 ft |
wall cap | (0.0 m) |
|
|
5" to 6" (12.7 cm to 15.2 cm) | 1 ft |
transition | (0.3 m) |
|
|
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